Disposable mouthpiece



FIG. 1 is a perspective view of a disposable mouthpiece showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof, the rear view being a mirror image thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a disposable mouthpiece, as shown and described. 